CN220158122U - Fine adjustment mechanism for bean grinder and bean grinder - Google Patents

Abstract

The utility model discloses a fine adjustment mechanism for a bean grinder, which comprises a cutter head assembly, a driving motor and an adjusting piece, wherein the cutter head assembly is arranged in a bean grinder body and comprises a first cutter head and a second cutter head; the driving motor is arranged in the bean grinder body and comprises a motor main body and a motor output shaft, and the upper part of the motor output shaft is fixedly connected with the second cutter head; the adjusting piece is arranged in the bean grinder body and is supported at the bottom of the motor output shaft; when the adjusting piece is adjusted, the motor output shaft can be driven to move up and down, and then the second cutterhead is driven to move up and down so as to adjust the gap between the first cutterhead and the second cutterhead. Therefore, by additionally arranging the fine adjustment mechanism on the traditional bean grinder, the fine adjustment mechanism is used for fine adjustment of the gap between the first cutter disc and the second cutter disc when the bean grinder leaves a factory, so that the gap between the first cutter disc and the second cutter disc is ensured to be a constant standard value, and the dimensional tolerance of parts is not required to be considered. In addition, the utility model also provides a bean grinder with the bean grinder.

Description

Fine adjustment mechanism for bean grinder and bean grinder

Technical Field

The utility model relates to the technical field of bean grinding machines, in particular to a fine adjustment mechanism for a bean grinding machine and the bean grinding machine.

Background

Along with the continuous improvement of the living standard of people, more and more people like to purchase coffee beans for grinding and then brew and drink, so that the coffee bean grinder can be used. In a coffee bean grinder, the cutter head assembly is a core component of the whole bean grinder, and the cutter head assembly generally comprises a first cutter head and a second cutter head, wherein the clearance between the first cutter head and the second cutter head directly influences the grinding coefficient of coffee beans. At present, when a coffee bean grinder leaves a factory, a gap between a first cutter disc and a second cutter disc of the coffee bean grinder needs to be ensured to be a constant standard value.

Because the coffee bean grinder contains a large number of parts, the machining size of each part has a certain tolerance, and when all the parts in the coffee bean grinder are assembled, the clearance between the first cutter disc and the second cutter disc is difficult to be ensured to be a constant value after the dimensional tolerances of all the parts are accumulated. In addition, the requirements of different clients on the standard values of the gaps between the first cutterhead and the second cutterhead are different, so that the requirements of different clients cannot be met.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the fine adjustment mechanism for the bean grinder and the bean grinder, and the fine adjustment mechanism is additionally arranged on the traditional bean grinder and is used for fine adjustment of the gap between the first cutter disc and the second cutter disc when the bean grinder leaves a factory, so that the gap between the first cutter disc and the second cutter disc is ensured to be a constant standard value when the bean grinder leaves a factory, the dimensional tolerance of parts is not required to be considered, and the practicality is higher.

The utility model adopts the technical proposal for solving the problems that:

a fine adjustment mechanism for a bean grinder, comprising:

the cutter head assembly is arranged in the bean grinder body and comprises a first cutter head and a second cutter head;

the driving motor is arranged in the bean grinder body and comprises a motor main body and a motor output shaft penetrating through the motor main body, and the upper part of the motor output shaft is fixedly connected with the second cutter head;

the adjusting piece is arranged in the bean grinder body and is supported on the motor output shaft;

when the adjusting piece is adjusted, the motor output shaft can be driven to move up and down, and then the second cutterhead is driven to move up and down so as to adjust the gap between the first cutterhead and the second cutterhead.

Therefore, when the clearance between the first cutter disc and the second cutter disc of the bean grinder is required to be adjusted when the bean grinder leaves a factory, a worker can drive the second cutter disc to move up and down through adjusting the adjusting piece until the clearance between the second cutter disc and the first cutter disc meets the factory setting requirement or meets the use requirement of a subsequent purchasing user.

Further, the device further comprises a gasket made of hard materials, and the gasket is arranged between the first cutter disc and the second cutter disc and used for controlling the gap between the first cutter disc and the second cutter disc.

Therefore, when the gap between the first cutter disc and the second cutter disc of the bean grinder is required to be adjusted when the bean grinder leaves a factory, a gasket with the thickness being the required gap value is firstly processed and placed between the first cutter disc and the second cutter disc, and then the second cutter disc is driven to move up and down by adjusting the adjusting piece until the second cutter disc and the first cutter disc jointly compress the gasket, so that the gap between the second cutter disc and the first cutter disc can be ensured to be the required value, and the use requirement of a factory setting or a subsequent user is met. That is, the spacer is used as an auxiliary reference for adjusting the gap, and the operation is convenient during adjustment.

Further, the device also comprises a locking mechanism, wherein the locking mechanism comprises a pressing plate and an elastic column arranged in the pressing plate; the adjusting piece is provided with a plurality of clamping grooves, and the elastic column can be inserted into the clamping grooves to limit the movement of the adjusting piece in the circumferential direction or the axial direction.

Further, the elastic column comprises a pressing column and a spring sleeved at one end of the pressing column, and the pressing plate is provided with a mounting groove for placing the spring and the pressing column; one end of the spring is abutted with the mounting groove, and the other end of the spring is abutted with the pressing column.

Further, the motor output shaft is further sleeved with a first bearing which is in fastening fit with the motor output shaft, a groove body used for limiting the first bearing is arranged in the motor main body, and at least one elastic gasket which is abutted to the first bearing is arranged in the groove body.

Further, the bean grinder further comprises a second cutter disc seat which is arranged in the bean grinder body and used for fixing the second cutter disc, a first clamping hole is formed in the bottom of the second cutter disc seat, and the motor output shaft is clamped in the first clamping hole through a clamping shaft so as to realize transmission connection.

Further, the bean grinder also comprises a top cover arranged in the bean grinder body, and a fastener which can be in threaded connection with the top of the motor output shaft is arranged on the top cover in a penetrating way;

the bottom of top cap is equipped with the fixture block, the second draw-in hole has been seted up at the top of second blade disc seat, the top cap passes through the fixture block joint is in the second draw-in hole is in order to realize transmission connection.

Further, the first cutterhead and the second cutterhead are respectively an upper cutterhead and a lower cutterhead which are arranged up and down; when the adjusting piece is adjusted, the lower cutter head can be driven to move up and down so as to adjust a gap between the top end face of the lower cutter head and the bottom end face of the upper cutter head;

or the first cutterhead and the second cutterhead are respectively an outer cutterhead and an inner cutterhead which are arranged inside and outside; when the adjusting piece is adjusted, the inner cutter disc can be driven to move up and down so as to adjust the gap between the outer side wall of the inner cutter disc and the inner side wall of the outer cutter disc.

Further, the adjusting piece is a fine adjustment stud which is in threaded connection with the bottom of the motor main body and is supported on the motor output shaft; a straight groove or a cross groove is formed in the bottom of the fine adjustment stud.

In addition, the utility model also provides a bean grinder, which comprises a machine body and the fine adjustment mechanism for the bean grinder, wherein:

the machine body is also provided with a cutterhead adjusting mechanism, and the cutterhead adjusting mechanism comprises a cutterhead fixing frame fixed on the machine body, a first cutterhead seat arranged in the cutterhead fixing frame and used for limiting the first cutterhead, and an adjusting ring sleeved on the cutterhead fixing frame and in transmission connection with the cutterhead fixing frame;

an elastic piece is arranged between the cutterhead fixing frame and the first cutterhead seat, and under the elastic action of the elastic piece, the first cutterhead seat can be driven to be abutted against the adjusting ring;

when the adjusting ring is adjusted, the first cutter disc seat can be driven to move up and down relative to the cutter disc fixing frame, and then the first cutter disc is driven to move up and down so as to adjust the gap between the first cutter disc and the second cutter disc.

In summary, according to the fine adjustment mechanism for the bean grinder and the bean grinder disclosed by the utility model, the fine adjustment mechanism is additionally arranged on the traditional bean grinder and is used for fine adjustment of the gap between the first cutter disc and the second cutter disc when the bean grinder leaves a factory, so that the gap between the first cutter disc and the second cutter disc is ensured to be a constant standard value when the bean grinder leaves a factory, and meanwhile, the standard value can be adjusted according to the use requirement of a subsequent customer, so that the bean grinder has higher practicability and higher popularization value.

Drawings

FIG. 1 is a schematic diagram of a bean grinder according to the present utility model;

FIG. 2 is a schematic view of a part of the structure of the bean grinder of the present utility model;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 3 with the adjustment ring hidden;

fig. 5 is a schematic structural diagram of fig. 4 with the first cutterhead seat hidden;

FIG. 6 is a schematic cross-sectional view of a portion of the structure of the bean grinder of the present utility model;

FIG. 7 is an enlarged partial schematic view of portion A of FIG. 6;

FIG. 8 is a schematic view of the structure of the adjusting member in the bean grinder of the present utility model;

FIG. 9 is a schematic view of the structure of the upper end cap in the bean grinder of the present utility model;

fig. 10 is a schematic structural view of a lower end cover in the bean grinder of the present utility model.

Wherein the reference numerals have the following meanings:

1. a body; 2. a cutterhead assembly; 201. a first cutterhead; 202. the second cutterhead; 3. a driving motor; 301. an upper end cap; 3011. a first mounting groove; 3012. a via hole; 3013. a tank body; 302. a lower end cap; 3021. a second mounting groove; 3022. a third mounting groove; 3023. a through hole; 303. a motor rotor; 304. a motor stator; 305. an output shaft of the motor; 4. an adjusting member; 401. a clamping groove; 402. a straight slot; 5. a locking mechanism; 501. a pressing plate; 502. pressing a column; 503. a spring; 6. a second bearing; 7. a first bearing; 8. an elastic pad; 9. the second cutterhead seat; 901. a first clamping hole; 902. a second clamping hole; 10. a clamping shaft; 11. a top cover; 1101. a clamping block; 12. a fastener; 13. a first cutterhead seat; 1301. a lug; 14. an adjusting ring; 15. cutter head fixing frame; 1501. a groove; 16. an elastic member.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1-10, the utility model provides a bean grinder, which comprises a machine body 1 and a cutter head adjusting mechanism arranged at the top of the machine body 1. Specifically, a grinding cavity and an assembling cavity are arranged up and down in the machine body 1, a cutter head assembly 2 is arranged in the grinding cavity, and the cutter head assembly 2 comprises a first cutter head 201 and a second cutter head 202. Specifically, the first cutterhead 201 and the second cutterhead 202 are respectively an upper cutterhead and a lower cutterhead which are arranged up and down along the height direction of the machine body 1. Alternatively, the first cutter 201 and the second cutter 202 are inner cutters and outer cutters.

The cutterhead adjusting mechanism comprises a cutterhead fixing frame 15 fixed at the top of the machine body 1, a first cutterhead seat 13 which is arranged in the cutterhead fixing frame 15 and used for limiting an upper cutterhead, and an adjusting ring 14 which is sleeved on the cutterhead fixing frame 15 and is in threaded connection with the cutterhead fixing frame 15. Specifically, the first cutterhead seat 13 is provided with a plurality of lugs 1301 in a ring manner, the cutterhead fixing frame 15 is also provided with a plurality of grooves 1501 corresponding to the plurality of lugs 1301, and the lugs 1301 are clamped in the grooves 1501 to realize that the first cutterhead seat 13 is arranged on the cutterhead fixing frame 15; in addition, the elastic member 16 is disposed in the recess 1501, and the lug 1301 abuts against the elastic member 16. Preferably, the elastic member 16 is a spring post. Therefore, under the elastic force of the elastic column, the first cutterhead seat 13 can be driven to abut against the adjusting ring 14.

Therefore, when the user needs to adjust the grinding degree of the coffee beans, the adjusting ring 14 can be screwed to drive the first cutter seat 13 to move up and down relative to the cutter fixing frame 15, so as to drive the first cutter 201 to move up and down to adjust the gap between the first cutter 201 and the second cutter 202, and further adjust the grinding degree.

The cutter head adjusting mechanism is used for adjusting the grinding degree of the coffee beans for a user.

However, when the bean grinder leaves the factory, it is necessary to ensure that the gap between the first cutter disc 201 and the second cutter disc 202 in the initial state is a constant standard value, that is, the gap between the first cutter disc 201 and the second cutter disc 202 is a standard value when the gear position of the adjusting ring 14 is zero. Therefore, the utility model adds a fine adjustment mechanism on the basis of the bean grinder, and the fine adjustment mechanism is provided for a merchant or a maintenance worker to adjust the gap between the first cutter 201 and the second cutter 202 of the bean grinder.

Referring to fig. 1-10 again, the fine adjustment mechanism includes a driving motor 3 disposed in the assembly cavity, the driving motor 3 includes a motor body and a motor output shaft 305 penetrating the motor body, and an upper portion of the motor output shaft 305 is fixedly connected with the lower cutter head. In addition, the fine adjustment mechanism further comprises an adjusting piece 4 which is arranged in the bean grinder body and is supported at the bottom of the motor output shaft 305. Therefore, when the adjusting member 4 is adjusted, the motor output shaft 305 is driven to move up and down, and the second cutterhead 202 is driven to move up and down, so as to adjust the gap between the first cutterhead 201 and the second cutterhead 202.

Preferably, the adjusting member 4 is a fine adjustment stud, and is screwed to the bottom of the motor body and supported on the motor output shaft 305. When the user turns the trimming stud, the trimming stud is driven to move up and down relative to the motor host, and the motor output shaft 305 is driven to move up and down. Therefore, when the clearance between the upper cutter disc and the lower cutter disc is zero when the bean grinder is required to leave the factory, the fine adjustment stud can be screwed until the upper cutter disc is abutted against the lower cutter disc.

Of course, in other embodiments, the adjusting member 4 may be a jacking mechanism, which includes a jack and a driving member for driving the jack to lift, where the jack is supported at the bottom of the motor output shaft 305; when the driving member drives the ejector rod to lift, the motor output shaft 305 can be driven to move up and down.

Also, in other embodiments, the bottom of the motor output shaft 305 may be disposed through the motor body, and the adjusting member 4 may be disposed in the body 1 to be supported on the motor output shaft 305, which is not limited herein.

Therefore, on the basis of the original cutter disc adjusting mechanism facing the user, the fine adjustment structure facing the business or maintenance staff is additionally arranged on the bean grinder provided by the utility model, so that the clearance between the first cutter disc 201 and the second cutter disc 202 can be finely adjusted when the bean grinder leaves the factory, the clearance between the first cutter disc 201 and the second cutter disc 202 is ensured to be a constant standard value when the bean grinder leaves the factory, and meanwhile, the standard value can be adjusted according to the use requirement of a subsequent customer, so that the bean grinder has higher practicability and higher popularization value.

Further, when the gap between the lower cutterhead and the upper cutterhead needs to be adjusted to a standard value, the auxiliary reference object can be used for adjusting the gap. Preferably, the auxiliary reference object may be a gasket made of hard material and having a standard thickness, and the gasket is arranged between the upper cutter and the lower cutter. In this embodiment, the spacer is an iron plate.

Specifically, when the gap between the lower cutterhead and the upper cutterhead needs to be adjusted to a standard value, firstly processing an iron sheet with the thickness being the standard value, then removing the upper cutterhead, placing the iron sheet on the lower cutterhead, and reassembling the upper cutterhead, then driving the lower cutterhead to move up and down by rotating the fine adjustment stud until the lower cutterhead and the upper cutterhead jointly compress the iron sheet, removing the upper cutterhead and taking out the iron sheet again, and then reassembling the upper cutterhead to ensure that the gap between the lower cutterhead and the upper cutterhead is the standard value.

Of course, in other embodiments, a sensor may be provided to detect the gap between the upper cutterhead and the lower cutterhead, as this is not limiting.

Further, in this embodiment, the upper cutterhead and the lower cutterhead are both flat cutterhead; the grinding degree of the coffee beans can be adjusted by adjusting the gap between the bottom end face of the upper cutter disc and the top end face of the lower cutter disc. Of course, the first cutter 201 and the second cutter 202 may be an outer cutter and an inner cutter which are disposed inside and outside, and both the outer cutter and the inner cutter are conical cutter; when the fine adjustment stud is screwed, the inner cutter head can be driven to move up and down to adjust the gap between the outer side wall of the inner cutter head and the inner side wall of the outer cutter head, so that the grinding degree of the coffee beans is adjusted.

In addition, in order to facilitate the user to screw the fine adjustment stud, a straight slot 402 is further formed at the bottom of the fine adjustment stud, so that the fine adjustment stud can be adjusted by a straight screwdriver. Of course, in other embodiments, cross grooves or other shaped grooves may be provided, without limitation.

Referring to fig. 2 and 8, to prevent the fine adjustment stud from rotating and causing the motor output shaft 305 to move, the bean grinder further includes a locking mechanism 5 for locking the adjustment member 4. Specifically, the locking mechanism comprises a pressing plate 501 detachably connected to the bottom of the motor main body and an elastic column arranged in the pressing plate 501; the elastic column comprises a pressing column 502 and a spring 503 sleeved at one end of the pressing column 502, and the pressing plate 501 is provided with a mounting groove for placing the spring 503 and the pressing column 502; one end of the spring 503 is in contact with the bottom wall of the mounting groove, and the other end is in contact with the pressing post 502. The upper part of the trimming stud is provided with a plurality of clamping grooves 401 along the circumferential direction, and the pressing column 502 can be inserted into the clamping grooves 401 under the action of the elasticity of the spring 503 to prevent the trimming stud from rotating, thereby realizing locking of the trimming stud. Similarly, when the trimming stud needs to be screwed, the pressing plate 501 needs to be detached from the motor body, and then the pressing post 502 is pulled out to be separated from the clamping groove 401, so that the trimming stud is in a non-locking state.

In other embodiments, when the jacking mechanism is used as the adjusting member 4, a plurality of clamping holes may be formed in the axial direction of the ejector rod, and the pressing post 502 may be inserted into the clamping holes to limit the movement of the ejector rod in the axial direction, thereby locking the ejector rod.

Referring to fig. 2, the bottom of the motor output shaft 305 is further sleeved with a second bearing 6 tightly matched with the motor output shaft, and the top of the fine adjustment stud abuts against and is supported on the second bearing 6. Thus, when the fine adjustment stud is rotated, the second bearing 6 is driven to move up and down, and the second bearing 6 is tightly matched with the motor output shaft 305, so that the motor output shaft 305 is driven to move up and down.

In addition, the motor output shaft 305 is further sleeved with a first bearing 7 which is tightly matched with the motor output shaft, a groove 3013 for limiting the first bearing 7 is arranged in the motor main body, and a plurality of elastic gaskets 8 which are abutted against the first bearing 7 are arranged in the groove 3013.

Therefore, a certain elastic pretightening force can be given to the first bearing 7 by arranging a plurality of elastic gaskets 8, so that the movement stability of the first bearing 7 is higher, and the first bearing 7 is prevented from shifting.

Referring to fig. 6 and fig. 9-10, the motor main body includes an upper end cover 301 and a lower end cover 302 which are arranged at intervals from top to bottom, a mounting cavity is formed between the upper end cover 301 and the lower end cover 302, a motor rotor 303 and a motor stator 304 sleeved on the outer periphery side of the motor rotor 303 are arranged in the mounting cavity, and the motor output shaft 305 is arranged on the motor rotor 303 in a penetrating manner and is in fastening fit with the motor rotor 303.

Thus, when the fine adjustment stud is rotated and the motor output shaft 305 is driven to move up and down, the motor rotor 303 is synchronously driven to move up and down relative to the motor stator 304.

Of course, in other embodiments, the inner rotor motor may be replaced by an outer rotor motor, that is, the motor rotor 303 is sleeved on the outer periphery side of the motor stator 304, and accordingly, the shape of the motor output shaft 305 needs to be adaptively adjusted, which can achieve the same technical effect, which is not limited herein.

Further, a first mounting groove 3011 with an opening at the bottom is formed in the middle of the upper end cover 301, the first bearing 7 and the plurality of elastic gaskets 8 are all arranged in the first mounting groove 3011, and two ends of the plurality of elastic gaskets 8 are respectively abutted against the first bearing 7 and the top wall of the first mounting groove 3011; a through hole 3012 through which the power supply output shaft 305 can pass is formed in the middle of the first mounting groove 3011.

Further, a second mounting groove 3021 having an upper and lower opening is formed in the middle of the lower end cap 302, the second bearing 6 is disposed in the second mounting groove 3021 and is located at the upper portion, and the trimming stud is disposed in the second mounting groove 3021 and is located at the lower portion. Specifically, the lower portion in the second mounting groove 3021 is provided with an internal thread, and the outer side wall of the fine tuning stud is provided with an external thread, and the external thread is connected with the internal thread to realize threaded connection on the lower end cap 302. In addition, a third mounting groove 3022 is further formed in the bottom of the lower end cover 302 at one side of the second mounting groove 3021, a screw hole is formed in the third mounting groove 3022, the pressing plate 501 is disposed in the third mounting groove 3022, and a mounting hole is formed in the pressing plate 501 corresponding to the screw hole; thus, the mounting and fixing of the pressing plate 501 can be realized by using bolts to pass through the mounting holes and be connected to the screw holes in a threaded manner. In addition, a through hole 3023 which is communicated with the second mounting groove 3021 and through which the pressing column 502 can pass is formed in the side portion of the third mounting groove 3022.

Referring to fig. 6-7, the bean grinder further includes a second cutterhead seat 9 disposed in the machine body 1 and used for fixing the lower cutterhead, a first clamping hole 901 is formed at the bottom of the second cutterhead seat 9, and the upper portion of the motor output shaft 305 is clamped in the first clamping hole 901 by a clamping shaft 10 to realize the fixed connection with the second cutterhead seat 9. Preferably, the latch 10 is a latch. In addition, a top cover 11 is also clamped at the top of the second cutterhead seat 9. Specifically, a clamping block 1101 is disposed at the bottom of the top cover 11, a second clamping hole 902 is formed at the top of the second cutterhead seat 9, and the top cover 11 is clamped in the second clamping hole 902 through the clamping block 1101 to realize transmission connection. In addition, the top cover 11 is provided with a fastener 12 which can be connected with the top of the motor output shaft 305 in a threaded manner. Preferably, the fastener 12 is a bolt.

Therefore, when the driving motor 3 drives the motor output shaft 305 to rotate, the motor output shaft 305 can drive the second cutterhead seat 9 to rotate through the clamping shaft 10 and the top cover 11, and further drive the lower cutterhead to rotate so as to grind the coffee beans.

In summary, according to the fine adjustment mechanism for the bean grinder and the bean grinder disclosed by the utility model, the fine adjustment mechanism is additionally arranged on the traditional bean grinder and is used for fine adjustment of the gap between the first cutter 201 and the second cutter 202 when the bean grinder leaves a factory, so that the gap between the first cutter 201 and the second cutter 202 is ensured to be a constant standard value when the bean grinder leaves a factory, and meanwhile, the standard value can be adjusted according to the requirement of a customer, so that the bean grinder has high practicability and high popularization value.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A fine tuning mechanism for a bean grinder, comprising:

the cutter head assembly is arranged in the bean grinder body and comprises a first cutter head and a second cutter head;

the driving motor is arranged in the bean grinder body and comprises a motor main body and a motor output shaft penetrating through the motor main body, and the upper part of the motor output shaft is fixedly connected with the second cutter head;

the adjusting piece is arranged in the bean grinder body and is supported on the motor output shaft;

when the adjusting piece is adjusted, the motor output shaft can be driven to move up and down, and then the second cutterhead is driven to move up and down so as to adjust the gap between the first cutterhead and the second cutterhead.

2. The fine adjustment mechanism for a bean grinder of claim 1, further comprising a spacer made of a hard material, the spacer being disposed between the first cutterhead and the second cutterhead for controlling a gap between the first cutterhead and the second cutterhead.

3. The fine adjustment mechanism for a bean grinder according to claim 1 or 2, further comprising a locking mechanism including a pressing plate and an elastic column provided in the pressing plate; the adjusting piece is provided with a plurality of clamping grooves, and the elastic column can be inserted into the clamping grooves to limit the movement of the adjusting piece in the circumferential direction or the axial direction.

4. The fine tuning mechanism for a bean grinder according to claim 3, wherein the elastic column comprises a pressing column and a spring sleeved at one end of the pressing column, and the pressing plate is provided with a mounting groove for placing the spring and the pressing column; one end of the spring is abutted with the mounting groove, and the other end of the spring is abutted with the pressing column.

5. The fine adjustment mechanism for a bean grinder according to claim 1 or 2, wherein the motor output shaft is further sleeved with a first bearing which is tightly matched with the motor output shaft, a groove body for limiting the first bearing is arranged in the motor main body, and at least one elastic gasket which is abutted against the first bearing is arranged in the groove body.

6. The fine adjustment mechanism for a bean grinder according to claim 1 or 2, further comprising a second cutterhead seat arranged in the body of the bean grinder and used for fixing the second cutterhead, wherein a first clamping hole is formed in the bottom of the second cutterhead seat, and the motor output shaft is clamped in the first clamping hole through a clamping shaft so as to realize transmission connection.

7. The fine adjustment mechanism for a bean grinder according to claim 6, further comprising a top cover provided in the body of the bean grinder, wherein a fastener which can be screwed with the top of the motor output shaft is provided in the top cover in a penetrating manner;

the bottom of top cap is equipped with the fixture block, the second draw-in hole has been seted up at the top of second blade disc seat, the top cap passes through the fixture block joint is in the second draw-in hole is in order to realize transmission connection.

8. The fine adjustment mechanism for a bean grinder according to claim 1 or 2, wherein the first cutterhead and the second cutterhead are an upper cutterhead and a lower cutterhead which are arranged up and down, respectively; when the adjusting piece is adjusted, the lower cutter head can be driven to move up and down so as to adjust a gap between the top end face of the lower cutter head and the bottom end face of the upper cutter head;

or the first cutterhead and the second cutterhead are respectively an outer cutterhead and an inner cutterhead which are arranged inside and outside; when the adjusting piece is adjusted, the inner cutter disc can be driven to move up and down so as to adjust the gap between the outer side wall of the inner cutter disc and the inner side wall of the outer cutter disc.

9. The fine adjustment mechanism for a bean grinder according to claim 1 or 2, wherein the adjustment member is a fine adjustment stud, and the fine adjustment stud is screwed to the bottom of the motor main body and supported on the motor output shaft; a straight groove or a cross groove is formed in the bottom of the fine adjustment stud.

10. Bean grinder, characterized by comprising a main body and a fine adjustment mechanism for a bean grinder according to any one of claims 1 to 9, wherein:

the machine body is also provided with a cutterhead adjusting mechanism, and the cutterhead adjusting mechanism comprises a cutterhead fixing frame fixed on the machine body, a first cutterhead seat arranged in the cutterhead fixing frame and used for fixing the first cutterhead, and an adjusting ring sleeved on the cutterhead fixing frame and in transmission connection with the cutterhead fixing frame;

an elastic piece is arranged between the cutterhead fixing frame and the first cutterhead seat, and under the elastic action of the elastic piece, the first cutterhead seat can be driven to be abutted against the adjusting ring;

when the adjusting ring is adjusted, the first cutter disc seat can be driven to move up and down relative to the cutter disc fixing frame, and then the first cutter disc is driven to move up and down so as to adjust the gap between the first cutter disc and the second cutter disc.